82"x48"x18" Commercial 4 Tier Shelf Adjustable Steel Wire Metal Shelving Rack 74 Heavy Duty Steel.Shelves are adjustable height at 1" increments.Commercial Grade Black Wire.No Tools Required for Assembly. Maximum Weight Capacity for entire Unit: 880 lbs.Maximum Weight Capacity per shelf: 220 lbs. equally distributed Maximum Weight Capacity for entire Unit when using the casters (wheels) instead of leveling feet is 220 lbs. Dimensions: 48"L x 18"W x 78"H(With stationary feet) Dimensions: 48"L x 18"W x 82"HWith Wheels)